Spatiotemporal polarization dynamics in a transverse multimode CO2 laser with optical feedback
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We investigate the polarization dynamics in a quasi-isotropic CO2 laser emitting on the TEM01* mode subjected to an optical feedback. We observe a complex dynamics in which spatial mode and polarization competition are involved. The observed dynamics is well reproduced by a model that discriminates between the intrinsic asymmetry due to the kinetic coupling of molecules with different angular momenta and the anisotropy induced by the polarization feedback. We observe various dynamical regimes including chaotic dynamics and show that feedback changes these states from regular to chaotic and vice versa. Finally, the possible applications to polarization coding are discussed.
KeywordsEuropean Physical Journal Special Topic Bifurcation Diagram Infrared Camera Dynamical Regime Polarization Code
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- 14.L. Olejniczak, M. Sciamanna, H. Thienpont, K. Panajotov, A. Mutig, F. Hopfer, D. Bimberg, “Polarization properties and instabilities of QD VCSELs”, Proc. SPIE 7720, Semiconductor Lasers and Laser Dynamics IV, 77201G (2010)Google Scholar